This is a guide to help you whiz up the most delicious possible smoothies in your blender, even without using recipes. We'll talk favorite ingredients, all-important smoothie texture, add-ins for protein and sweetness, and tips for getting the most out of your equipment. We'll discuss regular fruit-based and other sweet smoothies as well as savory smoothies, and we'll answer lots of questions about how to make those ubiquitous, sometimes hazardous-looking green smoothies work for you.

Flavor Tips: Fruit and Other Sweet Smoothies

Let's start with some good news. If you can think of a baked dessert, an ice cream flavor, a milkshake, juice, or lemonade flavor, a coffee or tea drink, or any little sweet nothing that you like, you can make it into a smoothie. And you can make it into a reasonably or even very good-for-you smoothie with some thoughtful substitutions. Instead of creams, think yogurt, or cashews blended with water. Instead of sugar or caramel, think dates (and check the section on sweetening below). Instead of sweetened bar chocolate, try raw cacao powder.

You can add interest with spices like cinnamon, nutmeg, cloves, ginger, and allspice, just as you would in a baked recipe...but in much smaller quantities.

*If you have a high-speed blender, a great substitute for nut milk is 1/4 cup of raw nuts and 1 to 2 cups of water. If you have a regular blender, a tablespoon of nut butter per cup of water works too.

Flavor: Green Smoothies

Love 'em or leave 'em, green smoothies are definitely a thing right now. And they're a thing that can taste pretty grotesque or actually really delicious, depending on how much you know. I'll address the critical question of texture a bit later; for now, let's tackle taste.

There are two approaches to green smoothies. One is to hide some greens in an otherwise sweet smoothie. Spinach works great here, since the taste is easily overridden with other flavors. The other approach is to embrace the greenness and balance the flavors as you would with a juice. Choose a sweet or savory approach (for savory, skip the fruit and add a pinch of salt or even a splash of soy sauce, if you're into it). Then think of ingredients that would make a good salad or soup, and they'll probably taste pretty good together. Savory green smoothies are a great place to experiment with leafy herbs.

As we mentioned last week in our collection of tips and tricks for making juice, the color of our food and drinks affects how they taste to us. Smart ingredient combinations—ones that don't produce grey or brown drinks—go a long way toward making good smoothies. I once made a "green" smoothie that turned out essentially black. A word of advice based on that experience: No.

How to Improve Your Smoothie Texture

A good fruit smoothie has a satisfying, creamy chill but isn't noticeably icy. It should be able to maintain its texture and emulsification as it warms up a bit so you don't have to inhale it in the first eight seconds. And if you let it, it should be able to trick you into thinking you're drinking a luscious dessert. A good green smoothie should be absolutely, perfectly smooth, with a bit of heft from higher-fat ingredients. Here are my top tips for achieving that level of smoothie bliss.

Freeze!

Blending up some ice cubes with your ingredients is okay in a pinch but can make it hard to get a good consistency going, so if you can freeze some of your smoothie ingredients ahead of time, you should. I'd estimate that the best consistency for a fruit smoothie usually comes from using two-thirds frozen ingredients where possible. Individual blender mileage will vary, so play around to see what works best.

For the most part, fruit is a freezing no-brainer. Peeled whole or sliced bananas, berries and cherries, sliced stone fruits, tropical fruits, grapes, and many other fruits freeze beautifully and still blend up well in a regular blender as long as you've cut them small and added enough liquid. High-speed blenders can handle large pieces of frozen fruit without much trouble as long as there's some liquid to get them started.

Depending on the strength of your blender, it can also be worth freezing a portion of the liquid ingredients. Nut milks, yogurt, coffee (with or without milk added), and even juices can be frozen in ice cube trays and added directly to the blender. Some of these may get a little icy, but but if there's a choice between adding frozen juice cubes and regular water-based ice cubes to a recipe, it's worth freezing the juice so as not to dilute the flavor.

Ingredients to Add for Better Texture

Nut Butters: Nothing takes a sweet smoothie from creaminess zero to hero as easily as a tablespoon or two of peanut, almond, or other nut or seed butter of your choice.

Avocado: is a second contender for most magical purveyor of creaminess to smoothies, and it's by far the best choice for green smoothies. You can even add half an avocado at the last minute to fix the texture of a smoothie that just isn't working out the way you'd hoped. It mellows flavors, too. Don't be afraid to try the avocado trick with fruit smoothies, too.

Cooked Oatmeal: In both sweet and savory smoothies, a few tablespoons of cooked oatmeal works wonders for adding creamy texture. I discovered this almost by accident, and it's one of the best tricks I know.

Greek Yogurt: In just about all smoothie types, a little Greek yogurt fills out texture beautifully.

Coconut Oil: In green smoothies where your ingredients aren't too cold, a tablespoon or two of virgin coconut oil adds good creaminess and a nice coconut flavor to the mix.

As far as I'm concerned, the queen of smoothie sweeteners is the Medjool date. It's super-sweet and caramel-like, and I've yet to find a smoothie in need of sweetness whose flavors were incompatible with the queen's.

If you're working with a high-speed blender—our reviews of the best ones are here—just remove the pit and drop in the whole date, no questions asked. Otherwise, it pays to know your blender. Some regular blenders can handle a chopped date just fine, but others will never get it completely smooth. If yours falls into the latter category, try soaking a finely chopped date in a little warm water or a bit of the liquid called for in the smoothie recipe, then blending it into a loose date paste before adding the rest of the smoothie ingredients.

Another great sweetening method for smoothies with bananas in them is simply to use really, really ripe bananas. This sounds sort of ridiculous but is actually an important part of my smoothie-making regime. Once every couple of months I'll buy a large quantity of bananas and let them ripen almost to oblivion, which is the perfect point of sweetness. Then I'll peel them and freeze them whole or halved in zip-top bags.

I don't typically sweeten smoothies outside of these methods, but if you want to, liquid sweeteners are your friends and will help you avoid a gritty texture. Try maple syrup if you think it will add a complementary flavor, honey, agave if you're into that, or even simple syrup.

Other Smoothie Add-Ins

There's a wide array of purported superfood and other just plain delicious ingredients to add to your smoothies. Some of my favorites are ground flax seed, chia seeds, maca, raw cacao, and matcha.

Then, of course, there's protein powder. Protein powders are a tricky business, varying tremendously in terms of ingredient quality, taste, and texture. I stayed away from them for years but ultimately discovered a pea protein and a brown rice protein that meet my needs on all of those fronts on days when I want a little extra staying power in my smoothies. If you find a product that meets your nutritional goals and doesn't have a discernible taste or chalky texture, protein powders can be added to most smoothies without too much tinkering. You may find you need a bit of extra liquid to absorb the powder and that it's better to drink those smoothies relatively quickly after blending.

A Word on Equipment: Regular vs. High-Speed Blenders

Like ovens, regular blenders— these are our favorites under $200—vary widely and each have their own personality and abilities. Some blend dates and even greens pretty well, and some, like my old (fairly pricey) one, just make a chopped salad instead of a green smoothie and then look you in the eye like everything's fine.

Lots of folks seem to want to hop on the high-speed (Vitamix, Blendtec, etc.) bandwagon but aren't sure it's worth the hefty price. I've had one for a couple of years now with no regrets except that once it scared the bejeezus out of my two-year-old neighbor, and I didn't see her out on the balcony again for several days. I use my blender almost daily, at least as much for salad dressings, sauces, and soups as for smoothies. In my case green smoothies were a no-go with a regular blender, but even for fruit smoothies I think the high-speed gives a better result since it can handle a higher ratio of frozen fruit to liquid.

Whether or not to buy a high-speed blender is really a personal decision, dictated as much by your cooking patterns as by your smoothie-making ones. Rather than give generic advice, I'm happy to answer any specific questions on this topic (and most others) in the comments.

Carolyn Cope is the voice behind the popular food and lifestyle blog Umami Girl, where she'll soon be releasing a free e-book filled with easy ways to incorporate more healthy, plant-based foods into your life. She is equal parts live-to-eat and eat-to-live and currently does both from London.

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